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Summation of (a+b)cos C in terms of a b and C where a b c are sides of the triangle and C is the angle opposite to side c

Summation of (a+b)cos C in terms of a b and C where a b c are sides of the triangle and C is the angle opposite to side c 

Grade:11

1 Answers

Anjani
15 Points
6 years ago
a+b+c is ans .....just apply cosine formula according to cosine rule and according to question and putin summation

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